JP5243658B2 - Method, apparatus, and system for obtaining load information - Google Patents

Description

  The present invention relates to the field of mobile communication technology, and in particular, to a method, apparatus, and system for obtaining load information.

  When the network becomes a broadband mobile system, the 3rd Generation Partnership Project (3GPP) is a long term evolution (LTE) solution for mobile access networks, that is, the land of evolutionary universal mobile communication systems. Evolved Universal Mobile Telecommunication System Terrestrial Radio Access Network (E-UTRAN), a solution of System Architecture Evolution (SAE), that is, Evolved Packet Core (Evolved Packet Core) , EPC). While some operators have evolved the Evolved Packet System (EPS) network, the EPS network provides only packet-switched (PS) domain data access, while The LTE / SAE architecture is expected to provide voice services over the 2G / 3G radio access network (RAN) and circuit switched (Circuit Switched, CS) domain core network. And the existing 2G / 3G CS domain core network coexist. User equipment (User Equipment, UE) is a global system for mobile communications (Global System for Mobile Communications, GSM (registered trademark)) / GSM (registered trademark) evolution type high-speed data rate (Enhanced Data Rate for GSM (registered trademark) Evolution) , EDGE) Access to CS domain core network via 2G / 3G RAN such as Radio Access Network (GERAN) or Universal Mobile Telecommunication System Terrestrial Radio Access Network (UTRAN) Can access EPC via E-UTRAN.

  Inter-RAT handover is supported to distribute the load between RAN, i.e., Radio Access Technology (RAT) systems. When the UE performs a CS domain handover between 2G / 3G RAT systems, the source access controller to which the source RAT system source cell belongs is relocated via the RELOCATION REQUIRED message and the RELOCATION COMMAND message or RELOCATION PREPARATION FAILURE message. It can interact with the access controller to which the target cell belongs.

  In each of the above technical solutions, when the Inter-RAT PS domain handover is performed, or before the Inter-RAT CS or PS domain handover is performed, the source RAT system may obtain the load information of the target RAT system. Therefore, Inter-RAT load balancing cannot be performed. As a result, the communication quality of the system cannot be guaranteed.

  According to the embodiment of the present invention, it is possible to acquire load information of the target RAT system by the source RAT system, and as a result, load information that implements Inter-RAT load distribution and guarantees communication quality of the system. Methods, apparatus, and systems are provided for obtaining.

One embodiment of the present invention provides a method for obtaining load information. This method
When an Inter-RAT PS domain handover is performed, the source access controller to which the source cell belongs sends an Inter-RAT handover request message to the target access controller to which the target cell belongs, via the core network;
Receiving, via the core network, an Inter-RAT handover response message carrying the load information of the target cell returned by the target access controller in response to the Inter-RAT handover request message by the source access controller.

One embodiment of the present invention provides another method for obtaining load information. This method
Before the Inter-RAT handover is executed, a load information request message based on RAN Information Management (RAN Information Management, RIM) is sent to the target access controller to which the target cell belongs by the source access controller to which the source cell belongs. A step of sending
Receiving, via the core network, a load information response message based on RIM carrying the load information of the target cell, returned by the source access controller in response to the load information request message based on RIM. .

One embodiment of the present invention provides an access controller. This access controller
A first transmission module configured to transmit an Inter-RAT handover request message via a core network to a target access controller to which a target cell belongs when an Inter-RAT PS domain handover is performed;
A first receiving module configured to receive, via the core network, an Inter-RAT handover response message transmitted by the target access controller in response to the Inter-RAT handover request message and carrying the load information of the target cell; including.

One embodiment of the present invention provides another access controller. This access controller
A third transmission module configured to transmit a load information request message based on RIM through the core network to the target access controller to which the target cell belongs before the Inter-RAT handover is performed;
Third reception configured to receive, via the core network, a RIM based load information response message carrying the load information of the target cell, returned by the target access controller in response to the RIM based load information request message. Including modules.

One embodiment of the present invention provides a system for obtaining load information. The system comprises a first source access controller to which a source cell of a source RAT system belongs, and a first target access controller to which a target cell of a target RAT system belongs,
When the Inter-RAT PS domain handover is executed, the first source access controller transmits an Inter-RAT handover request message to the first target access controller to which the target cell belongs via the core network. Configured to receive via the core network an Inter-RAT handover response message sent back by the target access controller and carrying the load information of the target cell,
The first target access controller receives the Inter-RAT handover request message transmitted via the core network by the first source access controller to which the source cell belongs, and receives the Inter-RAT handover request message via the core network to the first source access controller. -Configured to send back a RAT handover response message.

One embodiment of the present invention provides another system for obtaining load information. The system includes a second source access controller to which a source cell of the source RAT system belongs, and a second target access controller to which a target cell of the target RAT system belongs,
Before the Inter-RAT handover is performed, the second source access controller transmits a load information request message based on RIM to the second target access controller to which the target cell belongs, via the core network, and the second source access controller Configured to receive, via the core network, a RIM based load information response message sent back by the target access controller to convey the load information of the target cell;
The second target access controller receives a load information request message based on RIM transmitted via the core network by the second source access controller to which the source cell belongs, and receives load information based on RIM from the second source access controller. The response message is configured to be returned via the core network.

  According to each of the above technical solutions, the source access controller and the target access controller according to the embodiment of the present invention can interact via an Inter-RAT handover related message, and as a result, the source RAT system can perform Inter-RAT PS. When domain handover is performed, load information of the target RAT system can be acquired, and therefore load distribution between different RAT systems can be performed. This guarantees the communication quality of the system. The source access controller and the target access controller of the embodiment of the present invention can further interact via a load information request message based on RIM and a load information response message based on RIM, so that the source RAT system can perform inter-RAT It is possible to acquire the load information of the target RAT system before the handover is executed, and as a result, it is possible to implement the Inter-RAT load distribution. This guarantees the communication quality of the system.

  BRIEF DESCRIPTION OF THE DRAWINGS To describe the technical solutions of the present invention in an easy-to-understand manner, the embodiments of the present invention or the accompanying drawings necessary for describing the prior art will be described briefly. Apparently, the accompanying drawings show only some embodiments of the present invention. Those skilled in the art can derive other drawings from these drawings without any creative effort.

FIG. 1 is a schematic flowchart of a method for acquiring load information according to the first embodiment of the present invention. FIG. 2 is a schematic flowchart of a method for acquiring load information according to the second embodiment of the present invention. FIG. 3 is a schematic flowchart of a method for acquiring load information according to the third embodiment of the present invention. FIG. 4 is a schematic flowchart of a method for acquiring load information according to the fourth embodiment of the present invention. FIG. 5 is a schematic flowchart of a method for acquiring load information according to the fifth embodiment of the present invention. FIG. 6 is a schematic flowchart of a method for acquiring load information according to the sixth embodiment of the present invention. FIG. 7 is a schematic flowchart of a method for acquiring load information according to a seventh embodiment of the present invention. FIG. 8 is a schematic flowchart of another method for obtaining load information according to the eighth embodiment of the present invention. FIG. 9 is a schematic flowchart of another method for obtaining load information according to the ninth embodiment of the present invention. FIG. 10 is a schematic flowchart of another method for acquiring load information according to the tenth embodiment of the present invention. FIG. 11 is a schematic flowchart of another method for acquiring load information according to the eleventh embodiment of the present invention. FIG. 12 is a schematic flowchart of another method for obtaining load information according to the twelfth embodiment of the present invention. FIG. 13 is a schematic flowchart of another method for acquiring load information according to a thirteenth embodiment of the present invention. FIG. 14 is a schematic flowchart of another method for acquiring load information according to the fourteenth embodiment of the present invention. FIG. 15 is a schematic structural diagram of an access controller according to a fifteenth embodiment of the present invention. FIG. 16 is a schematic structural diagram of another access controller according to the sixteenth embodiment of the present invention. FIG. 17 is a schematic structural diagram of still another access controller according to the seventeenth embodiment of the present invention. FIG. 18 is a schematic structural diagram of still another access controller according to the eighteenth embodiment of the present invention. FIG. 19 is a schematic structural diagram of a system for acquiring load information according to a nineteenth embodiment of the present invention. FIG. 20 is a schematic structural diagram of another system for acquiring load information according to the twentieth embodiment of the present invention.

  In order to explain the technical solution of the present invention more clearly, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be appreciated that the embodiments herein are only some embodiments of the present invention. Those skilled in the art can derive other embodiments based on these embodiments of the present invention without any creative efforts, and all these other embodiments are within the protection scope of the present invention. .

  In this specification, for convenience of explanation, the load information of the target cell of the target RAT system is called load information of the target RAT system. Similarly, the load information of the source cell of the source RAT system is referred to as load information of the source RAT system.

  FIG. 1 is a flowchart of a method for acquiring load information according to the first embodiment of the present invention. As shown in FIG. 1, the method for acquiring load information according to the present embodiment includes the following steps.

  Step 101: When the Inter-RAT PS domain handover is performed, the source access controller to which the source cell of the source RAT system belongs is connected to the target access controller to which the target cell of the target RAT system belongs via the core network. A handover request message is transmitted.

  Step 102: The source access controller receives, via the core network, an Inter-RAT handover response message carrying the load information of the target cell returned by the target access controller in response to the Inter-RAT handover request message.

  The source RAT system and the target RAT system of this embodiment may be any two systems of GERAN, UTRAN, and E-UTRAN. The corresponding access controller is a base station system (Base Station System, BSS), a radio network controller (Radio Network Controller, RNC), or an evolved NodeB (evolved NodeB, eNB), respectively.

  In the present embodiment, transmission of the load information of the target cell may be performed by a transparent container information element (Information Element, IE) transmitted in an Inter-RAT handover related message.

  In this embodiment, the source access controller and the target access controller interact through an Inter-RAT handover related message. When Inter-RAT PS domain handover is executed, the source RAT system can acquire the load information of the target RAT system by the above method, and as a result, load distribution among different RAT systems is possible. It is said. Therefore, the communication quality of the system can be guaranteed.

  Inter-RAT PS domain handover is performed between any two of the aforementioned RAT systems. Each access controller in a different RAT system interacts with the core network via different handover related messages. Specific procedures are described in detail in the following six example embodiments of the present invention.

  FIG. 2 is a schematic flowchart of a method for acquiring load information according to the second embodiment of the present invention. As shown in FIG. 2, the present embodiment is applicable to PS domain handover from UTRAN to E-UTRAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 201: The source RNC to which the source cell belongs sends a RELOCATION REQUIRED (RELOCATION REQUIRED) message carrying the first transparent container IE carrying the source cell load information IE to the serving GPRS support node (SGSN). .

  Step 202: The SGSN receives the RELOCATION REQUIRED message, and transmits a first HANDOVER REQUEST message that conveys the first Transparent Container IE to the target eNB to which the target cell belongs.

  Step 203: The target eNB receives the first HANDOVER REQUEST message, and returns a HANDOVER REQUEST ACKNOWLEDGE message carrying the second transparent container IE carrying the target cell load information IE to the SGSN.

  Step 204: The SGSN receives the HANDOVER REQUEST ACKNOWLEDGE message and returns a first RELOCATION COMMAND message carrying the second Transparent Container IE to the source RNC.

  In the present embodiment, the first transparent container IE is an inter-system information transparent container (Inter-System Information Transparent Container) IE or a transparent container (Source eNB To Target eNB Transparent Container) IE from a source eNB to a target eNB. Good. Similarly, the second transparent container IE may be an inter-system information transparent container IE or a target eNB to source eNB transparent container IE.

  In this embodiment, the load information of different RAT systems is exchanged via the source cell load information IE conveyed by the first transparent container IE and the target cell load information IE conveyed by the second transparent container IE. When an Inter-RAT PS domain handover from UTRAN to E-UTRAN is performed, UTRAN and E-UTRAN can obtain the load information of the peer system by the above method, and as a result, between different RAT systems It is possible to implement load balancing in Therefore, the communication quality of the system is guaranteed.

  FIG. 3 is a schematic flowchart of a method for acquiring load information according to the third embodiment of the present invention. As shown in FIG. 3, the present embodiment is applicable to PS domain handover from UTRAN to GERAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 301: The source RNC to which the source cell belongs sends a RELOCATION REQUIRED message carrying the first transparent container IE carrying the source cell load information IE to the SGSN.

  Step 302: The SGSN receives the RELOCATION REQUIRED message, and sends a first PS-HANDOVER-REQUEST message that carries the first Transparent Container IE to the target BSS to which the target cell belongs.

  Step 303: The target BSS receives the first PS-HANDOVER REQUEST message, and returns a PS-HANDOVER-REQUEST-ACKNOWLEDGE message carrying the second transparent container IE carrying the target cell load information IE to the SGSN.

  Step 304: The SGSN receives the PS-HANDOVER-REQUEST-ACKNOWLEDGE message, and returns a second RELOCATION COMMAND message carrying the second transparent container IE to the source RNC.

  In the present embodiment, the first transparent container IE may be an Inter-System Information Transparent Container IE or a transparent container (Source BSS To Target BSS Transparent Container) IE from the source BSS to the target BSS. Similarly, the second Transparent Container IE may be an Inter-System Information Transparent Container IE or a target BSS To Source BSS Transparent Container IE.

  In this embodiment, the load information of different RAT systems is exchanged via the source cell load information IE conveyed by the first transparent container IE and the target cell load information IE conveyed by the second transparent container IE. When an Inter-RAT PS domain handover from UTRAN to GERAN is performed, UTRAN and GERAN can acquire the load information of the peer system by the above method, and as a result, load distribution between different RAT systems Can be implemented. Therefore, the communication quality of the system is guaranteed.

  FIG. 4 is a schematic flowchart of a method for acquiring load information according to the fourth embodiment of the present invention. As shown in FIG. 4, the present embodiment is applicable to PS domain handover from E-UTRAN to UTRAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 401: The source eNB to which the source cell belongs transmits a HANDOVER REQUIRED (HANDOVER REQUIRED) message that conveys the first transparent container IE that conveys the source cell load information IE to the SGSN.

  Step 402: The SGSN receives a HANDOVER REQUIRED message, and sends a first RELOCATION REQUEST message carrying the first Transparent Container IE to the target RNC to which the target cell belongs.

  Step 403: The target RNC receives the first RELOCATION REQUEST message, and returns a RELOCATION REQUEST ACKNOWLEDGE message carrying the second transparent container IE carrying the target cell load information IE to the SGSN.

  Step 404: The SGSN receives the RELOCATION REQUEST ACKNOWLEDGE message, and returns a first RELOCATION COMMAND message carrying the second Transparent Container IE to the source eNB.

  In the present embodiment, the first Transparent Container IE may be an Inter-System Information Transparent Container IE or a transparent container (Source RNC To Target RNC Transparent Container) IE from the source RNC to the target RNC. Similarly, the second transparent container IE may be an inter-system information transparent container IE or a target RNC to source RNC transparent container IE.

  In this embodiment, the load information of different RAT systems is exchanged via the source cell load information IE conveyed by the first transparent container IE and the target cell load information IE conveyed by the second transparent container IE. When Inter-RAT PS domain handover from E-UTRAN to UTRAN is executed, E-UTRAN and UTRAN can obtain the load information of the peer system by the above method, and as a result, between different RAT systems It is possible to implement load balancing in Therefore, the communication quality of the system is guaranteed.

  FIG. 5 is a schematic flowchart of a method for acquiring load information according to the fifth embodiment of the present invention. As shown in FIG. 5, the present embodiment is applicable to PS domain handover from GERAN to UTRAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 501: The source BSS to which the source cell belongs sends a PS-HANDOVER-REQUIRED (PS-HANDOVER-REQUIRED) message carrying the first transparent container IE carrying the source cell load information IE to the SGSN.

  Step 502: The SGSN receives a PS-HANDOVER-REQUIRED message, and sends a second RELOCATION REQUEST message carrying the first Transparent Container IE to the target RNC to which the target cell belongs.

  Step 503: The target RNC receives the second RELOCATION REQUEST message, and returns a RELOCATION REQUEST ACKNOWLEDGE message carrying the second transparent container IE carrying the target cell load information IE to the SGSN.

  Step 504: The SGSN receives the RELOCATION REQUEST ACKNOWLEDGE message, and returns a first PS-HANDOVER-REQUIRED-ACK (PS-HANDOVER-REQUIRED-ACK) message carrying the second Transparent Container IE to the source BSS.

  In the present embodiment, the first transparent container IE may be an Inter-System Information Transparent Container IE or a Source RNC To Target RNC Transparent Container IE. Similarly, the second transparent container IE may be an Inter-System Information Transparent Container IE or a Target RNC To Source RNC Transparent Container IE.

  In this embodiment, the load information of different RAT systems is exchanged via the source cell load information IE conveyed by the first transparent container IE and the target cell load information IE conveyed by the second transparent container IE. When Inter-RAT PS domain handover from GERAN to UTRAN is executed, GERAN and UTRAN can acquire the load information of the peer system by the above method, and as a result, load distribution between different RAT systems Can be implemented. Therefore, the communication quality of the system is guaranteed.

  FIG. 6 is a schematic flowchart of a method for acquiring load information according to the sixth embodiment of the present invention. As shown in FIG. 6, the present embodiment is applicable to PS domain handover from GERAN to E-UTRAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 601: The source BSS to which the source cell belongs sends a PS-HANDOVER-REQUIRED message carrying the first transparent container IE carrying the source cell load information IE to the SGSN.

  Step 602: The SGSN receives the PS-HANDOVER-REQUIRED message, and transmits a second HANDOVER REQUEST message that conveys the first Transparent Container IE to the target eNB to which the target cell belongs.

  Step 603: The target eNB receives the second HANDOVER REQUEST message, and returns a HANDOVER REQUEST ACKNOWLEDGE message carrying the second transparent container IE carrying the target cell load information IE to the SGSN.

  Step 604: The SGSN receives the HANDOVER REQUEST ACKNOWLEDGE message, and returns a second PS-HANDOVER-REQUIRED-ACK message carrying the second Transparent Container IE to the source BSS.

  In the present embodiment, the first transparent container IE may be an Inter-System Information Transparent Container IE or a Source eNB To Target eNB Transparent Container IE. Similarly, the second Transparent Container IE may be an Inter-System Information Transparent Container IE or a Target eNB To Source eNB Transparent Container IE.

  In this embodiment, the load information of different RAT systems is exchanged via the source cell load information IE conveyed by the first transparent container IE and the target cell load information IE conveyed by the second transparent container IE. When Inter-RAT PS domain handover from GERAN to E-UTRAN is executed, GERAN and E-UTRAN can obtain the load information of peer system by the above method, and as a result, between different RAT systems It is possible to implement load balancing in Therefore, the communication quality of the system is guaranteed.

  FIG. 7 is a schematic flowchart of a method for acquiring load information according to a seventh embodiment of the present invention. As shown in FIG. 7, the present embodiment is applicable to PS domain handover from E-UTRAN to GERAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 701: The source eNB to which the source cell belongs transmits a HANDOVER REQUIRED message that conveys the first transparent container IE that conveys the source cell load information IE to the SGSN.

  Step 702: The SGSN receives the HANDOVER REQUIRED message, and sends a second PS-HANDOVER-REQUEST message carrying the first Transparent Container IE to the target BSS to which the target cell belongs.

  Step 703: The target BSS receives the second PS-HANDOVER-REQUEST message, and returns a PS-HANDOVER-REQUEST-ACKNOWLEDGE message carrying the second transparent container IE carrying the target cell load information IE to the SGSN.

  Step 704: The SGSN receives the PS-HANDOVER-REQUEST-ACKNOWLEDGE message, and returns a second HANDOVER COMMAND message carrying the second Transparent Container IE to the source eNB.

  In the present embodiment, the first transparent container IE may be an Inter-System Information Transparent Container IE or a Source BSS To Target BSS Transparent Container IE. Similarly, the second Transparent Container IE may be an Inter-System Information Transparent Container IE or a Target BSS To Source BSS Transparent Container IE.

  In this embodiment, the load information of different RAT systems is exchanged via the source cell load information IE conveyed by the first transparent container IE and the target cell load information IE conveyed by the second transparent container IE. When Inter-RAT PS domain handover from E-UTRAN to GERAN is executed, E-UTRAN and GERAN can acquire the load information of the peer system by the above method, and as a result, between different RAT systems It is possible to implement load balancing in Therefore, the communication quality of the system is guaranteed.

  Note that the above second to seventh embodiments of the present invention are all successful handover scenarios. Those skilled in the art will readily understand that embodiments of the present invention can also be failed handover scenarios, that is, the second Transparent Container IE is conveyed in a response message indicating failure. In this document, such a scenario will not be described further.

  In the method for obtaining load information according to the first to seventh embodiments of the present invention, the source access controller and the target access controller exchange load information only after the source access controller starts a handover-related procedure. Can do. In this case, the target cell load information obtained by the source access controller cannot avoid the failure of the current handover due to overload of the target access controller, but the next successful handover to implement load balancing between different RAT systems As a result, the communication quality of the system is guaranteed.

  FIG. 8 is another flowchart of another method for acquiring load information according to the eighth embodiment of the present invention. As shown in FIG. 8, the method for acquiring load information according to the present embodiment includes the following steps.

  Step 801: Before the Inter-RAT handover is executed, the source access controller to which the source cell of the source RAT system belongs is loaded with load information based on RIM via the core network to the target access controller to which the target cell of the target RAT system belongs. Send a request message.

  Step 802: The source access controller receives, via the core network, a load information response message based on RIM, which is returned by the target access controller in response to a load information request message based on RIM and conveys load information of the target cell.

  In the present embodiment, the source RAT system and the target RAT system may be any two of GERAN, UTRAN, and E-UTRAN. Corresponding access controllers are BSS, RNC, and eNB, respectively.

  In this embodiment, the source access controller can transmit a load information request message based on RIM to the target access controller in an event-driven manner or a regular manner. For example, if the load on the source cell exceeds 60%, the source cell will drive its source access controller to send a RIM based load information request message to the target access controller via the core network. Report a predetermined event to the source access controller, or the source access controller is driven to send a load information request message based on RIM over the core network to the target access controller at predetermined intervals.

  In the present embodiment, the source access controller and the target access controller can interact via a load information request message based on RIM and a load information response message based on RIM, so that the source RAT system is inter-RAT. The load information of the target RAT system is acquired before the handover is executed. Therefore, load distribution between different RAT systems is possible, and the communication quality of the system is guaranteed.

  It should be noted that the number of target cells in the method for acquiring load information according to the present embodiment may be one or more. Specifically, in the load information request message based on RIM, one or a plurality of target cells can be indicated by conveying a cell ID of one target cell or a list of cell IDs of a plurality of target cells. For a large number of target cells, after receiving a load information request message based on RIM carrying a list of cell IDs for a large number of target cells, the core network determines each target cell's according to the target cell ID in the list of cell IDs. Place the target access controller. Each target access controller returns a load information response message based on RIM that conveys load information of each target cell to the source access controller to which the source cell belongs. The source access controller and a number of target access controllers interact via a load information request message based on RIM and a load information response message based on RIM, so that the source RAT system can perform before an Inter-RAT handover is performed. Get load information for many target RAT systems. In order to implement load distribution between different RAT systems by the above method, a target cell can be selected more efficiently according to load information of a large number of cells. Therefore, the communication quality of the system is further guaranteed.

  In this embodiment, since no interface is defined between the source access controller and the target access controller, the load information request message and the load information response message are transmitted from the SGSN (PS domain) or the mobile switching center (MSC, Can be transmitted transparently via the CS domain.

  Before an Inter-RAT PS domain handover between any two of the aforementioned RAT systems is performed, each access controller in a different RAT system interacts with the core network via a different RIM related message. Specific procedures are described in detail in the following six example embodiments of the present invention.

  FIG. 9 is a schematic flowchart of another method for obtaining load information according to the ninth embodiment of the present invention. As shown in FIG. 9, the present embodiment is applicable to a handover from UTRAN to E-UTRAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 901: The source RNC to which the source cell belongs has a first DIRECT INFORMATION TRANSFER that conveys the first Inter-System Information Transfer Type IE that conveys the first RIM TRANSFER IE that conveys the source cell load information IE to the SGSN or MSC. Send a message.

  Step 902: The SGSN or MSC receives the first DIRECT INFORMATION TRANSFER message, and sends the first MME DIRECT INFORMATION TRANSFER message that conveys the first Inter-System Information Transfer Type IE to the target eNB to which the target cell belongs. .

  Step 903: The target eNB receives the first MME DIRECT INFORMATION TRANSFER message, and sends the second Inter-System Information Transfer Type IE that conveys the second RIM TRANSFER IE that conveys the target cell load information IE to the SGSN or MSC. Reply with eNB DIRECT INFORMATION TRANSFER message.

  Step 904: The SGSN or MSC receives the eNB DIRECT INFORMATION TRANSFER message, and returns a second DIRECT INFORMATION TRANSFER message carrying the second Inter-System Information Transfer Type IE to the source RNC.

  In this embodiment, the load information of different RAT systems is exchanged via the source cell load information IE conveyed by the first transparent container IE and the target cell load information IE conveyed by the second transparent container IE. Before an inter-RAT handover from UTRAN to E-UTRAN is performed, UTRAN and E-UTRAN can obtain the load information of the peer system in the above manner, and as a result, between different RAT systems It is possible to implement load balancing. Therefore, the communication quality of the system is guaranteed.

  FIG. 10 is a schematic flowchart of another method for acquiring load information according to the tenth embodiment of the present invention. As shown in FIG. 10, the present embodiment is applicable to a handover from UTRAN to GERAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 1001: The source RNC to which the source cell belongs has a first DIRECT INFORMATION TRANSFER message that conveys the first Inter-System Information Transfer Type IE that conveys the first RIM TRANSFER IE that conveys the source cell load information IE to the SGSN or MSC. Send.

  Step 1002: The SGSN or MSC receives the first DIRECT INFORMATION TRANSFER message, and the first RIM-PDU-TRANSFER that conveys the first RIM Container IE that conveys the source cell load information IE to the target BSS to which the target cell belongs. Send a .req message.

  Step 1003: The target BSS receives the first RIM-PDU-TRANSFER.req message and sends the first RIM-PDU-TRANSFER carrying the second RIM Container IE carrying the target cell load information IE to the SGSN or MSC. Reply with .ind message.

  Step 1004: The SGSN or MSC receives the first RIM-PDU-TRANSFER.ind message and sends the third RIM TRANSFER IE that carries the target cell load information IE to the source RNC. Reply with a third DIRECT INFORMATION TRANSFER message telling Type IE.

  In the present embodiment, the first RIM-PDU-TRANSFER.req message can include a RAN-INFORMATION-REQUEST PDU message, and the first RIM-PDU-TRANSFER.ind message includes a RAN-INFORMATION PDU message. Can do.

  In this embodiment, the load information of different systems is transmitted as source cell load information IE between the first RIM Transfer IE and the first RIM Container IE, and between the second RIM Container IE and the second RIM Transfer IE. It is exchanged by conveying the target cell load information IE. Before an inter-RAT handover from UTRAN to GERAN is performed, UTRAN and GERAN can obtain the load information of the peer system in the above manner, and as a result, load distribution between different RAT systems Implementation is possible. Therefore, the communication quality of the system is guaranteed.

  FIG. 11 is a schematic flowchart of another method for acquiring load information according to the eleventh embodiment of the present invention. As shown in FIG. 11, this embodiment is applicable to a handover from E-UTRAN to UTRAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 1101: The source eNB to which the source cell belongs sends an eNB DIRECT INFORMATION TRANSFER message carrying the second Inter-System Information Transfer Type IE carrying the second RIM TRANSFER IE carrying the source cell load information IE to the SGSN or MSC. To do.

  Step 1102: The SGSN or MSC receives the eNB DIRECT INFORMATION TRANSFER message, and transmits a second DIRECT INFORMATION TRANSFER message that conveys the second Inter-System Information Transfer Type IE to the target RNC to which the target cell belongs.

  Step 1103: The target RNC receives the second DIRECT INFORMATION TRANSFER message and informs the SGSN or MSC of the first Inter-System Information Transfer Type IE that conveys the first RIM TRANSFER IE that conveys the target cell load information IE. Reply the first DIRECT INFORMATION TRANSFER message.

  Step 1104: The SGSN or MSC receives the first DIRECT INFORMATION TRANSFER message, and returns a first MME DIRECT INFORMATION TRANSFER message carrying the first Inter-System Information Transfer Type IE to the source eNB.

  In this embodiment, the load information of different RAT systems is exchanged via the source cell load information IE conveyed by the first transparent container IE and the target cell load information IE conveyed by the second transparent container IE. Before the Inter-RAT handover from E-UTRAN to UTRAN is performed, E-UTRAN and UTRAN can obtain the load information of the peer system in the above manner, and as a result, between different RAT systems It is possible to implement load balancing. Therefore, the communication quality of the system is guaranteed.

  FIG. 12 is a schematic flowchart of another method for obtaining load information according to the twelfth embodiment of the present invention. As shown in FIG. 12, the present embodiment is applicable to a handover from GERAN to UTRAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 1201: The source BSS to which the source cell belongs sends a second RIM-PDU-TRANSFER.req message carrying a third RIM Container IE carrying source cell load information IE to the SGSN or MSC.

  Step 1202: The SGSN or MSC receives the second RIM-PDU-TRANSFER.req message, and transmits the third RIM Transfer IE that conveys the source cell load information IE to the target RNC to which the target cell belongs. -System Information Transfer Type Sends a third DIRECT INFORMATION TRANSFER message telling IE.

  Step 1203: The target RNC receives the third DIRECT INFORMATION TRANSFER message and informs the SGSN or MSC of the first Inter-System Information Transfer Type IE that conveys the first RIM TRANSFER IE that conveys the target cell load information IE. Reply the first DIRECT INFORMATION TRANSFER message.

  Step 1204: The SGSN or MSC receives the first DIRECT INFORMATION TRANSFER message and sends a second RIM-PDU-TRANSFER.ind message to the source BSS that carries the fourth RIM Container IE that carries the target cell load information IE. Send back.

  In the present embodiment, the second RIM-PDU-TRANSFER.req message can include a RAN-INFORMATION-REQUEST PDU message, and the second RIM-PDU-TRANSFER.ind message includes a RAN-INFORMATION PDU message. Can do.

  In this embodiment, the load information of different systems is the source cell load information IE transmitted by the third RIM Container IE and the third RIM Transfer IE, and the first RIM Transfer IE and the fourth RIM Container IE It is exchanged by conveying the target cell load information IE. Before the inter-RAT handover from GERAN to UTRAN is performed, GERAN and UTRAN can obtain the load information of the peer system in the above manner, and as a result, load distribution between different RAT systems Implementation is possible. Therefore, the communication quality of the system is guaranteed.

  FIG. 13 is a schematic flowchart of another method for acquiring load information according to a thirteenth embodiment of the present invention. As shown in FIG. 13, the present embodiment is applicable to a handover from GERAN to E-UTRAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 1301: The source BSS to which the source cell belongs sends a second RIM-PDU-TRANSFER.req message carrying a third RIM Container IE carrying source cell load information IE to the SGSN or MSC.

  Step 1302: The SGSN or MSC receives the second RIM-PDU-TRANSFER.req message, and transmits the third RIM Transfer IE that carries the third RIM Transfer IE that carries the source cell load information IE to the target eNB to which the target cell belongs -System Information Transfer Type Sends a second MME DIRECT INFORMATION TRANSFER message to convey IE.

  Step 1303: The target eNB receives the second MME DIRECT INFORMATION TRANSFER message, and sends the second Inter-System Information Transfer Type IE that conveys the second RIM TRANSFER IE that conveys the target cell load information IE to the SGSN or MSC. Reply with eNB DIRECT INFORMATION TRANSFER message.

  Step 1304: SGSN or MSC receives eNB DIRECT INFORMATION TRANSFER message and returns to source BSS 3rd RIM-PDU-TRANSFER.ind message carrying 5th RIM Container IE carrying target cell load information IE .

  In the present embodiment, the second RIM-PDU-TRANSFER.req message can include a RAN-INFORMATION-REQUEST PDU message, and the third RIM-PDU-TRANSFER.ind message includes a RAN-INFORMATION PDU message. Can do.

  In the present embodiment, the load information of different systems is transmitted as source cell load information IE between the third RIM Container IE and the third RIM Transfer IE, and between the second RIM Transfer IE and the fifth RIM Container IE. It is exchanged by conveying the target cell load information IE. Before the inter-RAT handover from GERAN to E-UTRAN is performed, GERAN and E-UTRAN can obtain the load information of the peer system in the above manner, and as a result, between different RAT systems It is possible to implement load balancing. Therefore, the communication quality of the system is guaranteed.

  FIG. 14 is a schematic flowchart of another method for acquiring load information according to the fourteenth embodiment of the present invention. As shown in FIG. 14, this embodiment is applicable to a handover from E-UTRAN to GERAN. The method for acquiring load information according to the present embodiment may include the following steps.

  Step 1401: The source eNB to which the source cell belongs sends an eNB DIRECT INFORMATION TRANSFER message carrying the second Inter-System Information Transfer Type IE carrying the second RIM TRANSFER IE carrying the source cell load information IE to the SGSN or MSC. To do.

  Step 1402: SGSN or MSC receives eNB DIRECT INFORMATION TRANSFER message, and third RIM-PDU-TRANSFER.req that conveys sixth RIM Container IE that conveys source cell load information IE to target BSS to which the target cell belongs. Send a message.

  Step 1403: The target BSS receives the third RIM-PDU-TRANSFER.req message and sends the first RIM-PDU-TRANSFER that carries the second RIM Container IE carrying the target cell load information IE to the SGSN or MSC. Reply with .ind message.

  Step 1404: SGSN or MSC receives the first RIM-PDU-TRANSFER.ind message, and the third Inter-System Information Transfer that conveys the third RIM TRANSFER IE that conveys the target cell load information IE to the source eNB Reply with a second MME DIRECT INFORMATION TRANSFER message telling Type IE.

  In the present embodiment, the third RIM-PDU-TRANSFER.req message can include a RAN-INFORMATION-REQUEST PDU message, and the first RIM-PDU-TRANSFER.ind message includes a RAN-INFORMATION PDU message. Can do.

  In this embodiment, the load information of different systems is transmitted as source cell load information IE between the second RIM Transfer IE and the sixth RIM Container IE, and between the second RIM Container IE and the third RIM Transfer IE. It is exchanged by conveying the target cell load information IE. Before the Inter-RAT handover from E-UTRAN to GERAN is performed, E-UTRAN and GERAN can obtain the load information of the peer system in the above manner, and as a result, between different RAT systems It is possible to implement load balancing. Therefore, the communication quality of the system is guaranteed.

  In the method for acquiring load information according to the eighth to fourteenth embodiments of the present invention, load information is acquired between the source access controller and the target access controller before the source access controller starts a handover-related procedure. The In this case, the target cell load information acquired by the source access controller can be used to guarantee the success of the current handover, and to help effectively avoid the failure of the current handover due to overload of the target access controller. Can do. Therefore, in order to guarantee the communication quality of the system, it is possible to perform load distribution between different RAT systems.

  For convenience of explanation, all of the above embodiments of the present invention have been described as a series of actions, but the present invention is not limited to the series of actions described herein, according to the present invention, some steps are It should be noted that one skilled in the art can understand that they can be performed in other orders or can be performed simultaneously. Those skilled in the art will also appreciate that the embodiments described herein are only some embodiments of the present invention, and that such actions and modules are not essential to the present invention.

  Each above-mentioned embodiment of the present invention has each gist. Points not described in detail in one embodiment of the present invention are described in detail in the related description of another embodiment.

  FIG. 15 is a schematic structural diagram of an access controller according to a fifteenth embodiment of the present invention. As shown in FIG. 15, the access controller of this embodiment can include a first transmission module 151 and a first reception module 152. The first transmission module 151 is configured to transmit an Inter-RAT handover request message via the core network to the target access controller to which the target cell belongs when the Inter-RAT PS domain handover is performed. The first receiving module 152 is configured to receive, via the core network, an Inter-RAT handover response message carrying the load information of the target cell, returned by the target access controller in response to the Inter-RAT handover request message. The

  Source access controller of the first embodiment of the present invention, source RNC of the second embodiment of the present invention, source RNC of the third embodiment of the present invention, source eNB of the fourth embodiment of the present invention, book The source BSS of the fifth embodiment of the invention, the source BSS of the sixth embodiment of the invention, and the source eNB of the seventh embodiment of the invention are all implemented by the access controller provided in this embodiment. sell.

  FIG. 16 is a schematic structural diagram of another access controller according to the sixteenth embodiment of the present invention. As shown in FIG. 16, the access controller of this embodiment includes a second reception module 161 and a second transmission module 162. The second reception module 161 is configured to receive the Inter-RAT handover request message transmitted by the source access controller to which the source cell belongs via the core network, and the second transmission module 162 An Inter-RAT handover response message that conveys the load information of the target cell that the access controller of the present embodiment is responsible for is returned to the source access controller via the core network.

  Target access controller of the first embodiment of the present invention, target eNB of the second embodiment of the present invention, target BSS of the third embodiment of the present invention, target RNC of the fourth embodiment of the present invention, book The target RNC of the fifth embodiment of the invention, the target eNB of the sixth embodiment of the present invention, and the target BSS of the seventh embodiment of the present invention are all implemented by the access controller provided in this embodiment. sell.

  FIG. 17 is a schematic structural diagram of still another access controller according to the seventeenth embodiment of the present invention. As shown in FIG. 17, the access controller of this embodiment of the present invention can include a third transmission module 171 and a third reception module 172. The third transmission module 171 is configured to transmit a load information request message based on RIM via the core network to the target access controller to which the target cell belongs before the Inter-RAT handover is performed. The third receiving module 172 receives a load information response message based on the RIM that conveys the load information of the target cell, returned by the target access controller in response to the load information request message based on the RIM, via the core network. Composed.

  Source access controller of the eighth embodiment of the present invention, source RNC of the ninth embodiment of the present invention, source RNC of the tenth embodiment of the present invention, source eNB of the eleventh embodiment of the present invention, book The source BSS of the twelfth embodiment of the invention, the source BSS of the thirteenth embodiment of the invention, and the source eNB of the fourteenth embodiment of the invention are all implemented by the access controller provided in this embodiment. sell.

  FIG. 18 is a schematic structural diagram of still another access controller according to the eighteenth embodiment of the present invention. As shown in FIG. 18, the access controller of this embodiment includes a fourth reception module 181 and a fourth transmission module 182. The fourth reception module 181 is configured to receive a load information request message based on RIM transmitted via the core network by the source access controller to which the source cell belongs, and the fourth transmission module 182 A load information response message based on RIM that conveys load information of a target cell for which the access controller provided in this embodiment is responsible is configured to be returned to the source access controller via the core network.

  Target access controller of the eighth embodiment of the present invention, target eNB of the ninth embodiment of the present invention, target BSS of the tenth embodiment of the present invention, target RNC of the eleventh embodiment of the present invention, book The target RNC of the twelfth embodiment of the invention, the target eNB of the thirteenth embodiment of the invention, and the target BSS of the fourteenth embodiment of the invention are all implemented by the access controller provided in this embodiment. sell.

  FIG. 19 is a schematic structural diagram of a system for acquiring load information according to a nineteenth embodiment of the present invention. As shown in FIG. 19, the system for acquiring load information according to the present embodiment includes a first source access controller 10 to which a source cell of a source RAT system belongs, and a first target to which a target cell of a target RAT system belongs. And an access controller 20.

  When the Inter-RAT PS domain handover is executed, the first source access controller 10 transmits an Inter-RAT handover request message to the first target access controller 20 to which the target cell belongs via the core network. Configured to receive an Inter-RAT handover response message carrying the load information of the target cell, returned by the first target access controller 20, via the core network.

  The first target access controller 20 is configured to receive an Inter-RAT handover request message transmitted via the core network by the first source access controller 10 to which the source cell belongs, and the first source access controller 10 Is configured to send back an Inter-RAT handover response message via the core network.

  Source access controller of the first embodiment of the present invention, source RNC of the second embodiment of the present invention, source RNC of the third embodiment of the present invention, source eNB of the fourth embodiment of the present invention, book The source BSS according to the fifth embodiment of the invention, the source BSS according to the sixth embodiment of the present invention, and the source eNB according to the seventh embodiment of the present invention are all in the system for acquiring load information according to the present embodiment. The target access controller of the first embodiment of the present invention, the target eNB of the second embodiment of the present invention, the target BSS of the third embodiment of the present invention, which can be implemented by one source access controller 10 The target RNC of the fourth embodiment of the present invention, the target RNC of the fifth embodiment of the present invention, the target eNB of the sixth embodiment of the present invention, and the target BSS of the seventh embodiment of the present invention are all , Load of this embodiment It can be performed by the first target access controller 20 of a system for acquiring multi-address.

  In this embodiment, the source access controller and the target access controller can interact via an Inter-RAT handover related message. When Inter-RAT PS domain handover is executed, the source RAT system can acquire the load information of the target RAT system by the above method, and as a result, load distribution among different RAT systems is possible. It is said. Therefore, the communication quality of the system can be guaranteed.

  FIG. 20 is a schematic structural diagram of another system for acquiring load information according to the twentieth embodiment of the present invention. As shown in FIG. 20, the system for acquiring load information of the present embodiment includes a second source access controller 30 to which the source cell of the source RAT system belongs and a second target to which the target cell of the target RAT system belongs. And an access controller 40.

  Before the Inter-RAT handover is executed, the second source access controller 30 transmits a load information request message based on RIM to the second target access controller 40 to which the target cell belongs via the core network. A RIM-based load information response message that is configured and returned by the second target access controller 40 that conveys the load information of the target cell is configured to be received via the core network.

  The second target access controller 40 is configured to receive a load information request message based on RIM transmitted via the core network by the second source access controller 30 to which the source cell belongs, and the second source access controller 30 is configured to return a load information response message based on RIM via the core network.

  Source access controller of the eighth embodiment of the present invention, source RNC of the ninth embodiment of the present invention, source RNC of the tenth embodiment of the present invention, source eNB of the eleventh embodiment of the present invention, book The source BSS of the twelfth embodiment of the invention, the source BSS of the thirteenth embodiment of the invention, and the source eNB of the fourteenth embodiment of the invention are all systems for obtaining load information of the embodiment The second source access controller 30 of the eighth embodiment of the present invention, the target eNB of the ninth embodiment of the present invention, the tenth embodiment of the present invention Target BSS, target RNC of the eleventh embodiment of the present invention, target RNC of the twelfth embodiment of the present invention, target eNB of the thirteenth embodiment of the present invention, and target of the fourteenth embodiment of the present invention All BSS It can be carried out by the second target access controller 40 of a system for acquiring load information of the present embodiment.

  In the present embodiment, the source access controller and the target access controller can interact via a load information request message based on RIM and a load information response message based on RIM, so that the source RAT system is inter-RAT. The load information of the target RAT system is acquired before the handover is executed. With the above method, load distribution between different RAT systems can be performed, and the communication quality of the system can be guaranteed.

  Those skilled in the art will appreciate that all or part of the method steps of the embodiments of the present invention may be performed by hardware under program instructions. This program can be stored in a computer-readable storage medium, and when the program is executed, the method steps of the embodiments of the present invention are executed. This storage medium is any medium that can store program code, such as read only memory (ROM), random access memory (RAM), magnetic disk, or compact disk read only memory (CD-ROM). There may be.

  Although the present invention has been specifically described through several embodiments, the present invention is not limited to these embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention. The present invention is intended to encompass the provided modifications and variations, or equivalents thereof, which fall within the scope of protection defined in the claims.

10 First source access controller
20 First target access controller
30 Second source access controller
40 Second target access controller
151 First transmission module
152 First receiver module
161 Second transmission module
162 Second receiver module
171 Third transmission module
172 Third receiver module
181 Fourth transmission module
182 Fourth receiver module

Claims (13)

A method for obtaining load information,
Before the Inter-Radio Access Technology (RAT) handover is performed, the source access controller to which the source cell belongs sends the radio access network (RAN) via the core network to the target access controller to which the target cell belongs. ) Sending a load information request message based on information management (RIM);
The load information response message based on the RIM that conveys the load information of the target cell returned by the target access controller in response to the load information request message based on the RIM is received by the source access controller via the core network. A method comprising the steps of: The Inter-RAT handover is a handover from a universal mobile communication system terrestrial radio access network (UTRAN) to an evolved UTRAN (E-UTRAN), and the source cell to which the source cell belongs belongs to the target cell. Sending the load information request message based on the RIM to the target access controller via the core network;
Transmitting a first DIRECT INFORMATION TRANSFER message to a serving GPRS support node (SGSN) or a mobile switching center (MSC) by a source radio network controller (RNC) to which the source cell belongs, 1 DIRECT INFORMATION TRANSFER message, the SGSN or the MSC, to the target evolution NodeB (eNB) to which the target cell belongs, the first Inter-System Information Transfer Type information element (IE) To transmit the first MME DIRECT INFORMATION TRANSFER message to convey the first RIM transfer IE to convey the load information IE of the source cell, to convey the first Inter-System Information Transfer Type IE,
The load information response message based on the RIM that conveys the load information of the target cell returned by the target access controller in response to the load information request message based on the RIM is received by the source access controller via the core network. Said step of
Receiving a second DIRECT INFORMATION TRANSFER message sent back by the SGSN or the MSC by a source RNC, wherein the second DIRECT INFORMATION TRANSFER message is responsive to the eNB DIRECT INFORMATION TRANSFER message sent back by the target eNB The eNB DIRECT INFORMATION TRANSFER message is transmitted by the SGSN or the MSC, and the second Inter-System Information Transfer Type IE that conveys the second RIM TRANSFER IE that conveys the load information IE of the target cell. 2. The method according to claim 1, wherein the second DIRECT INFORMATION TRANSFER message conveys the second Inter-System Information Transfer Type IE. The Inter-RAT handover is a handover from an evolved universal mobile communication system terrestrial radio access network (E-UTRAN) to a universal mobile communication system terrestrial radio access network (UTRAN), and the source access controller to which the source cell belongs The step of transmitting a load information request message based on the RIM via the core network to the target access controller to which the target cell belongs,
The eNB DIRECT INFORMATION TRANSFER message is transmitted to a serving GPRS support node (Serving GPRS Support Node, SGSN) or a mobile switching center (MSC) by a source evolved NodeB (eNB) to which the source cell belongs, and the eNB DIRECT The INFORMATION TRANSFER message is an information element (IE) of the load information of the source cell so that the SGSN or the MSC sends a second DIRECT INFORMATION TRANSFER message to the target radio network controller (RNC) to which the target cell belongs. The second RIM TRANSFER IE that conveys the second Inter-System Information Transfer Type IE that conveys the IE, and the second DIRECT INFORMATION TRANSFER message is the second Inter-System Information Transfer Type IE Tell
The load information response message based on the RIM that conveys the load information of the target cell returned by the target access controller in response to the load information request message based on the RIM is received by the source access controller via the core network. Said step of
Receiving a first MME DIRECT INFORMATION TRANSFER message returned by the SGSN or the MSC by a source eNB, wherein the first MME DIRECT INFORMATION TRANSFER message is returned by the target RNC. The first DIRECT INFORMATION TRANSFER message is returned by the SGSN or the MSC in response to the INFORMATION TRANSFER message, and the first DIRECT INFORMATION TRANSFER message carries the first RIM TRANSFER IE carrying the load information IE of the target cell. 2. The method according to claim 1, wherein a transfer type IE is conveyed, and the first MME DIRECT INFORMATION TRANSFER message conveys the first inter-system information transfer type IE. Inter-RAT handover is a global system for mobile communications (GSM (registered trademark)) / GSM (registered trademark) evolved high-speed data rate (EDGE) radio access network (GERAN) to evolved universal mobile communication system terrestrial radio access This is a handover to a network (E-UTRAN), and the source access controller to which the source cell belongs transmits a load information request message based on the RIM to the target access controller to which the target cell belongs through the core network. Said step comprises
A step of transmitting a second RIM-PDU-TRANSFER.req message to a serving GPRS support node (SGSN) or a mobile switching center (MSC) by a source base station system (BSS) to which the source cell belongs. The second RIM-PDU-TRANSFER.req message is for the SGSN or the MSC to send a second MME DIRECT INFORMATION TRANSFER message to the target evolved NodeB (eNB) to which the target cell belongs. , A third RIM container IE that conveys an information element (IE) of the load information of the source cell, and the second MME DIRECT INFORMATION TRANSFER message is a third RIM TRANSFER IE that conveys the load information IE of the source cell. 3rd Inter-System Information Transfer Type IE
The load information response message based on the RIM that conveys the load information of the target cell returned by the target access controller in response to the load information request message based on the RIM is received by the source access controller via the core network. Said step of
Receiving a third RIM-PDU-TRANSFER.ind message sent back by the SGSN or the MSC by a source BSS, wherein the third RIM-PDU-TRANSFER.ind message is sent back by the target eNB The eNB DIRECT INFORMATION TRANSFER message is returned by the SGSN or the MSC in response to the eNB DIRECT INFORMATION TRANSFER message, and the eNB DIRECT INFORMATION TRANSFER message carries the second RIM TRANSFER IE carrying the load information IE of the target cell. The method according to claim 1, wherein the third RIM-PDU-TRANSFER.ind message carries a fifth RIM CONATINER IE carrying the load information IE of the target cell. . The Inter-RAT handover is an evolutionary universal mobile communication system terrestrial radio access network (E-UTRAN) to a global system for mobile communication (GSM (registered trademark)) / GSM (registered trademark) evolved high-speed data rate (EDGE). This is a handover to a radio access network (GERAN), and a load information request message based on the RIM is transmitted via the core network to the target access controller to which the target cell belongs by the source access controller to which the source cell belongs. Said step comprises
The eNB DIRECT INFORMATION includes a step of transmitting an eNB DIRECT INFORMATION TRANSFER message to a serving GPRS support node (SGSN) or a mobile switching center (MSC) by a source evolved NodeB (eNB) to which the source cell belongs, In the TRANSFER message, the SGSN or the MSC transmits a third RIM CONATINER IE for transmitting the information element (IE) of the load information of the source cell to the target base station system (BSS) to which the target cell belongs. In order to transmit the RIM-PDU-TRANSFER.req message, the second Inter-System Information Transfer Type IE that conveys the second RIM TRANSFER IE that conveys the load information IE of the source cell is conveyed. ,
The load information response message based on the RIM that conveys the load information of the target cell returned by the target access controller in response to the load information request message based on the RIM is received by the source access controller via the core network. Said step of
Receiving, by a source eNB, a second MME DIRECT INFORMATION TRANSFER message sent back by the SGSN or the MSC, wherein the second MME DIRECT INFORMATION TRANSFER message is sent back by the target BSS. Returned by the SGSN or the MSC in response to a PDU-TRANSFER.ind message, the first RIM-PDU-TRANSFER.ind message carries a second RIM CONATINER IE carrying the load information IE of the target cell, 2. The second MME DIRECT INFORMATION TRANSFER message carries the third Inter-System Information Transfer Type IE carrying the third RIM TRANSFER IE carrying the load information IE of the target cell. The method described. The Inter-RAT handover is performed from a universal mobile communication system terrestrial radio access network (UTRAN) to a global system for mobile communication (GSM (registered trademark)) / GSM (registered trademark) evolved high-speed data rate (EDGE) radio access network ( GERAN), the step of transmitting a load information request message based on the RIM via the core network to the target access controller to which the target cell belongs by the source access controller to which the source cell belongs,
Transmitting a first DIRECT INFORMATION TRANSFER message to a serving GPRS support node (SGSN) or a mobile switching center (MSC) by a source radio network controller (RNC) to which the source cell belongs, In the DIRECT INFORMATION TRANSFER message of 1, the SGSN or the MSC transmits the first RIM CONATINER IE that conveys the information element (IE) of the load information of the source cell to the target base station system (BSS) to which the target cell belongs. In order to transmit the first RIM-PDU-TRANSFER.req message to be transmitted, the first inter-system information transfer type (Inter-System Information Transfer Type) that transmits the first RIM TRANSFER IE that transmits the load information IE of the source cell is transmitted. ) Tell IE,
The load information response message based on the RIM that conveys the load information of the target cell returned by the target access controller in response to the load information request message based on the RIM is received by the source access controller via the core network. Said step of
Receiving a third DIRECT INFORMATION TRANSFER message returned by the SGSN or the MSC by a source RNC, wherein the third DIRECT INFORMATION TRANSFER message is the load information IE of the target cell returned by the target eNB. In response to the first RIM-PDU-TRANSFER.ind message carrying a second RIM CONATINER IE carrying a third RIM TRANSFER IE carrying the target cell load information IE returned in response to the SGSN or the MSC The method according to claim 1, characterized in that a third Inter-System Information Transfer Type IE is transmitted. The Inter-RAT handover is a global mobile communication system (GSM (registered trademark)) / GSM (registered trademark) evolved high-speed data rate (EDGE) radio access network (GERAN) to a universal mobile communication system terrestrial radio access network ( UTRAN), the step of transmitting a load information request message based on the RIM via the core network to the target access controller to which the target cell belongs by the source access controller to which the source cell belongs,
A step of transmitting a second RIM-PDU-TRANSFER.req message to a serving GPRS support node (SGSN) or a mobile switching center (MSC) by a source base station system (BSS) to which the source cell belongs. The second RIM-PDU-TRANSFER.req message includes the information element (IE) of the load information of the source cell by the SGSN or the MSC to the target radio switching center (RNC) to which the target cell belongs. To transmit the third DIRECT INFORMATION TRANSFER message to convey the third RIM TRANSFER IE to convey, convey the third RIM CONATINER IE to convey the load information IE of the source cell,
The load information response message based on the RIM that conveys the load information of the target cell returned by the target access controller in response to the load information request message based on the RIM is received by the source access controller via the core network. Said step of
Receiving a second RIM-PDU-TRANSFER.ind message sent back by the SGSN or the MSC by a source BSS, the second RIM-PDU-TRANSFER.ind message sent back by the target RNC In response to the first DIRECT INFORMATION TRANSFER message, the SGSN or the MSC returns the first DIRECT INFORMATION TRANSFER message. The Inter-System Information Transfer Type IE of the second RIM-PDU-TRANSFER.ind message carries a fourth RIM CONATINER IE that carries the load information IE of the target cell. The method described.   8. The method according to any one of claims 1 to 7, wherein there are one or a plurality of target cells.   The step of transmitting a load information request message based on the RIM via the core network to the target access controller to which the target cell belongs by the source access controller to which the source cell belongs. The source access controller to which the source cell belongs The method according to claim 1, further comprising a step of transmitting a load information request message based on the RIM to the target access controller to which the target cell belongs via the core network in an event-driven manner or a periodic manner. The method as described in any one of.   10. The method according to claim 1, wherein the load information request message based on the RIM conveys load information of the source cell. An access controller,
Before the Inter-Radio Access Technology (RAT) handover is performed, the load based on the radio access network (RAN) information management (RIM) via the core network to the target access controller to which the target cell belongs A third sending module configured to send an information request message;
The load information response message based on the RIM that conveys the load information of the target cell returned by the target access controller in response to the load information request message based on the RIM is configured to be received via the core network. And a third receiving module. A system for obtaining load information, comprising a second access controller to which a source cell of a source radio access technology (RAT) system belongs, and a second target access controller to which a target cell of a target RAT system belongs,
The second source access controller is connected to the second target access controller to which the target cell belongs via a core network before the inter-RAT handover is performed. A load information request message based on information management (RIM) is transmitted, and a load information response message based on the RIM that transmits the load information of the target cell returned by the second target access controller is transmitted via the core network. Configured to receive
The second target access controller receives the load information request message based on the RIM transmitted via the core network by the second source access controller to which the source cell belongs, and sends the load information request message to the second source access controller. A system configured to return a load information response message based on RIM via the core network. A computer readable storage medium comprising computer program code which, when executed by a computer unit, causes the computer unit to execute the method according to any one of claims 1 to 10. Medium.

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